(bug 49001) Restrict editing the Query namespace on Wikidata

I used the query-update right, expecting that it would be added to the
Wikibase extension in the future.
Also, I added the Query_talk namespace, since it would logically follow
that they wouldn't need to be edited.

Change-Id: I6c12f0cce252859dc1463eb159f06833d9b43295